Grinder and shredder



Oct.. 20, 1925. y 1,557,888

H. J. SHELTON GRINDER AND SHREDDER.

Filed Nov, 1, 1922 o n BY A 7-0 /vfy Patented Oct. 20, 1925;

UNITEDI STATES HARRY J'. BHELTON, 0l' BT. LOUIS,A IISNUI.

GBJJI'DEB AND SHBEDDEB.

Application med November 1, 1m. Serial le. 500,856.

To all whom z't may concern.:

Be it known that I, HARRY J. SHnL'roN, residing in the city of St.Louis, in the State of Missouri, have invented a new and useful Imrovement in Grinders and Shredders, of which the following is a full,clear, and exact specification, reference being had to the accompanyingdrawings, which form a part thereof.

My invention relates to grinders and Shredders and more particularly torinders and Shredders wherein the material to be ground is, to a certainextent, drawn or blown into the machine by a current of air induced by asuction fan and is drawn or blown, in the same manner, from the housingof the machine after it has been ground.

In using such a machine if one material is ground and then it is desiredto grind a material to a different degree of fneness it is necessary tochange the erforated late forming the lower circum erential wal of thegrinding chamber so as to provide a surface having either smaller orlarger openings, as the case may be, through which material is passedwhen ground.

Heretofore ders and Shredders have been made Wit the housingthereof'formed with an upper and lower section, one lower edge of the uper section being hinged to the correspon in upper edge of the lowersection so that t e upper section might be swung away from the lowersection to ex- Iose the grinding chamber of the machine.

o gain access in this wa to the grinding chamber in a grinder anshredder and to change the tperforated plate therein, was a long and teious task since a feed pipe connecting with a bin was usually attachedto the intake opening of the grinder and this pipe had to be removed orartially removed when the upper section o the grinder and shredder wasswung back las described above. In addition it was diicult to remove theperforated late even after access to the grindin cham er had beenobtained.

The o jects of my invention are to grovide a grinder and shredderconstructe so that the rforated plate formi the lower wall of t egrinding. chamber t erein may yand lower sections; to

be luickly and easily removed and replaced i wit removable cage for holng the perforated rovide a partially,

plate forming the lower wall of the -grinding chamber; and to providemeans whereby said cage and said perforated plate may be easily renderedaccessible.

My. invention is fully shown in the accompanying drawings whereinsimilar letters are used to designate similar parts. Fig. 1 is a-(planview, in section, of a grinder and shre der embody my invention; andFig. 2 is a partial side view along the lines 2-2 in Fig. 1.

`Referring to the figures the grinder has the housing A, comprising theside walls E, only shown in part in the drawings, which are heldtogether by the tie rods a back wall, preferabl formed by the plate F;and a front wall The housing A has the grinding chamber B therein withthe ham-v mers C mounted on and ada ted to be rotated lEiy the shaft Dourna ed in the side walls as shown in ig. 1. The grinding chamber hasthe up er circumferential wall T, onl partially s own, which terminatesat its ront end in a bar N attached thereto and which, lpreferablextends between the side walls of the ousing. yA grinding plate K, onlypartially shown, is preferab y mounted so as to cover apart of the in-.side surface of the wall T, all vas shown in Fig. 2. The lowercircumferential wall of the grinding chamber Bis formed by the@perforated plate H which is removably mounted in the substantiallysemi-circular cage J. One end of the cage J, referably the rear end, isprovided with t e lugs L so that the cge may be sw'inably mounted on therod as shown in i. 2. The other end of the ca e J is provide withtheflange N which is a ted to be held in contact with and secure tothe barNbythe bolts O or any other suitable means, preferably, arran ed so asto be loosened or -ti htened from t e outside of the housing. e

housing whereby lower edge of the front wall G is inserted in therecesses P formed near the lower edges of the side walls E and the upperend of the wall G is normally heldin place by the wedge R which lits inthe slots Q. The slots 'Q are, preferably, formed in lugs Q extendingfrom the side walls E, as shown in Flg. 1. The ribs S positioned on theside walls of the housing and arranged to follow the contour of thelower circumferential wall of the grinding chamber are provided to makea close joint between the side walls E and the plate H when in operativesition.

When it is desired'to substltute for the perforated late H a platehaving different size per orations therein the wed e R 1s removed fromthe slots Q, thereby al owing the front wall G to be swung outwardly atlthe top, as shown in Fig. 2, and then 'be removed by liftin the lowerend thereof out of the recesses The bolts O which normally hold the cagein lace at the lower side of thel grinding cham r are removed `and thecage J is swung into the position shown b the dotted lines in Fig. 2.The perforated p ate H may then be quickly and easily removed and a newplate substituted therefor. When the substitution has been completed thecage is raised so that the flange N engages with the bar N and the boltsO are inserted in place. When the cage J is lowered any load which is inthe machine is dumped into the lower part of the housing thus renderingit easier to move the perforatedplate H, as described. When the bolts 0have been put in place and tightened, the lower edge of the front wallGis inserted in the recesses P, then swung into place and the wedge R ishammered down into the slots Q.

I do not propose to limit my invention to the specific details ofconstruction shown in the drawingssince it may be readily seen that themethod of normally holding the cage J in place, the method of retainingthe front wall G in place, and the form of the various parts, may bevaried within wide limits without deviating from the spirit of mylnvention.

What I claim as new and desire to secure by Letters Patent is:

1. A inder and shredder comprising a housin aving' a 'grinding'chamberwith revolvab e hammers mounted therein, a cage hingedly supported atits rear end, a rforated plate removably mounted in said cage to formthe lower circumferential wall of said 'nding chamber, and mea-ns fordetacha ly securing the front end of said cage to the uppercircumferential wall of said said plate is maintained in operativeposition.

2. A grinder and shredder comprising a housing having a grinding chamberwith vrevoluble hammers mounted therein, a cage 3. A grinder andshredder comprisingl a' housing having a grinding chamber with revolublehammers mounted therein, a. cage hingedly supported at the rear end ofsaid grinding chamber, a perforated plateremovably mounted in said cageto form the` lower circumferential wall of said grinding chamber, thefront end of said cage having a iiange thereon, a bar extending betweenthe side walls of said housing at the front end of said grindingchamber, means for detachably securing said flange to said bar wherebysaid plate is maintained in operative position, a. rib provided on theinnersurface of each of the side walls of said grinding chamber andarranged to follow the contour of said plate when said plate is inoperative position, and the front wall of said housing being constructedand arranged so that it may be removed therefrom.

4. In a grinder and shredder of the class described, the combination ofa housing having a grinding chamber with revoluble hammers mountedtherein, a cage hingedly mounted on said housing at its rear end, aperforated plate removably mounted in said cage to. form the lowercircumferential wall of said grinding chamber, means whereby the frontend of said cage is detachably secured to hold said plate in operativeyposition, and the front wall of said housing adjacentthe front end ofthe said ca'ge being constructed and arranged so that it may be removedfrom said housing'without disarranging the other parts thereof, wherebywhen the frontend of said cage is detached and lnoved into inoperativeposition said plate may be removed therefrom through the opening left bv the removal ofsaid front wall. f

5. In a grinder and shredder of the class described, the combination ofa housing havin'g va grinding chamber with revoluble hammers mountedtherein, a cage hingedly mounted on said housing at its rear end, aperforated plate removably mounted in said cage to form the lowercircumferential wall of said grinding chamber, thev front end of saidcage having a flange arranged thereon. a bar extending between the sidewalls of said housing at the front end of the upper without disarrangingthe other partsv therecircumferential wall of said grinding chamandarranged so that the portion thereof beber, means which may be loosenedfrom the low said bar may be removed from. said outside of said housingfor detachably sehousin without disarranging the other 10 curing saidan'ge to said bar to hold said partst ereof.

5 cage and said plate inoperative position, In witness whereofIhavesigned my name and the front wall of said 'housing adjacent to thisspecification. the front end of said cage being constructed HARRY J.SHELTON.

